Global Patent Index - EP 3815795 A1

EP 3815795 A1 20210505 - MEMBRANE TRANSDUCER WITH IMPROVED BANDWIDTH

Title (en)

MEMBRANE TRANSDUCER WITH IMPROVED BANDWIDTH

Title (de)

MEMBRANWANDLER MIT VERBESSERTER BANDBREITE

Title (fr)

TRANSDUCTEUR À MEMBRANE DOTÉ D'UNE LARGEUR DE BANDE AMÉLIORÉE

Publication

EP 3815795 A1 20210505 (EN)

Application

EP 19206202 A 20191030

Priority

EP 19206202 A 20191030

Abstract (en)

An effective bandwidth in a membrane based ultrasonic transducer is improved by a control element (C). The control element (C) is disposed on a first side (10a) of a first membrane (10) of the transducer to increase or decrease a displacement amplitude of the first membrane (10) towards the first side (10a) and/or the opposite, second side (10b). This induces a displacement asymmetry (Za<>Zb) in a motion of the first membrane (10) during a first vibration (V1) of the first membrane (10) to the first side (10a) compared to the second side (10b). The displacement asymmetry may result in improved bandwidth.

IPC 8 full level

B06B 1/06 (2006.01)

CPC (source: CN EP US)

B06B 1/0276 (2013.01 - US); B06B 1/06 (2013.01 - CN EP); B06B 1/0603 (2013.01 - US); B06B 1/0614 (2013.01 - CN EP US); B06B 1/0644 (2013.01 - CN EP)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3815795 A1 20210505; CN 114630718 A 20220614; CN 114630718 B 20240823; EP 4051441 A1 20220907; JP 2023500043 A 20230104; US 2024139772 A1 20240502; WO 2021086184 A1 20210506

DOCDB simple family (application)

EP 19206202 A 20191030; CN 202080076479 A 20201029; EP 20800745 A 20201029; JP 2022521975 A 20201029; NL 2020050670 W 20201029; US 202017769276 A 20201029